NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2008029
SUBJ: SVN 48 (PRN 07) LAUNCH JDAY 075
1.     NANU TYPE: LAUNCH
       NANU NUMBER: 2008029
       NANU DTG: 160248Z MAR 2008
       SVN: 48
       PRN: 07
       LAUNCH JDAY: 075
       LAUNCH TIME ZULU: 0610
2. GPS SATELLITE SVN 48 (PRN 07) WAS LAUNCHED ON JDAY 075 A USABINIT NANU WILL 
BE SENT WHEN THE SATELITTE IS SET ACTIVE TO SERVICE.
3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV 
   MILITARY - GPS OPERATIONS CENTER AT
HTTP://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541, 
   COMM 719-567-2493, GPS_SUPPORT@SCHRIEVER.AF.MIL, 
HTTP://HTTP://GPS.AFSPC.AF.MIL/GPSOC/GPS
   MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276- 9994. COMM 
805-606-9994.
   JSPOCCOMBATOPS@VANDENBERG.AF.MIL

NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2008030 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS *** GPS SATELLITE SVN32 (PRN01) WAS SET 
UNUSABLE ON JDAY 077 (17 MAR 2008) AT 1953Z.  SVN32 (PRN01) WAS DECOMMISSIONED 
FROM ACTIVE SERVICE ON JDAY 077 (17 MAR 2008) AT 2200Z.  PRN01 WILL BE 
AVAILABLE FOR FUTURE SATELLITE SERVICE.
*** GENERAL MESSAGE TO ALL GPS USERS ***

   POC: 
   CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV
   MILITARY - GPS OPERATIONS CENTER AT HTTP://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-
2541,
     COMM 719-567-2541, GPS_SUPPORT@SCHRIEVER.AF.MIL, 
HTTP://GPS.AFSPC.AF.MIL/GPS 
   MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN    276-9994, 
     COMM 805-606-9994, JSPOCCOMBATOPS@VANDENBERG.AF.MIL

NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2008111 NANU TYPE: GENERAL 
*** GENERAL MESSAGE TO ALL GPS USERS ***
ON APPROXIMATELY 24 SEP 2008, SVN32 WILL RESUME TRANSMITTING L-BAND UTILIZING PRN01.
AT L-BAND ACTIVATION, SVN32/PRN01 WILL BE UNUSABLE UNTIL FURTHER NOTICE.
ADDITIONALLY, NO BROADCAST ALMANACS WILL INCLUDE SVN32/PRN01.
FUTURE NANUS WILL NOTIFY USERS OF ANY CHANGES TO THE ABOVE-STATED STATUS.

*** GENERAL MESSAGE TO ALL GPS USERS ***

   POC: 
   CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV
   MILITARY - GPS OPERATIONS CENTER AT HTTP://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
     COMM 719-567-2541, GPS_SUPPORT@SCHRIEVER.AF.MIL, HTTP://GPS.AFSPC.AF.MIL 
   MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN    276-9994, 
     COMM 805-606-9994, JSPOCCOMBATOPS@VANDENBERG.AF.MIL

NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2008130 NANU TYPE: GENERAL 
*** GENERAL MESSAGE TO ALL GPS USERS ***
ON 16 OCT 2008, SVN32 DISCONTINUED TRANSMITTING L-BAND.  PRN01 IS AVAILABLE FOR FUTURE SATELLITE SERVICE.
*** GENERAL MESSAGE TO ALL GPS USERS ***

   POC: 
   CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV
   MILITARY - GPS OPERATIONS CENTER AT HTTP://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
     COMM 719-567-2541, GPS_SUPPORT@SCHRIEVER.AF.MIL, HTTP://GPS.AFSPC.AF.MIL 
   MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN    276-9994, 
     COMM 805-606-9994, JSPOCCOMBATOPS@VANDENBERG.AF.MIL

NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2008131 NANU TYPE: GENERAL 
*** GENERAL MESSAGE TO ALL GPS USERS ***
ON APPROXIMATELY 23 OCT 2008, SVN37 WILL RESUME TRANSMITTING L-BAND UTILIZING PRN01.
AT L-BAND ACTIVATION, SVN37/PRN01 WILL BE UNUSABLE UNTIL FURTHER NOTICE.
ADDITIONALLY, NO BROADCAST ALMANACS WILL INCLUDE SVN37/PRN01.
FUTURE NANUS WILL NOTIFY USERS OF ANY CHANGES TO THE ABOVE-STATED STATUS.
*** GENERAL MESSAGE TO ALL GPS USERS ***

   POC: 
   CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV
   MILITARY - GPS OPERATIONS CENTER AT HTTP://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
     COMM 719-567-2541, GPS_SUPPORT@SCHRIEVER.AF.MIL, HTTP://GPS.AFSPC.AF.MIL 
   MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN    276-9994, 
     COMM 805-606-9994, JSPOCCOMBATOPS@VANDENBERG.AF.MIL

NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2008141
SUBJ: LEAP SECOND
1.  CONDITION: THE INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS
SERVICE (IERS) HAS ANNOUNCED THE INTRODUCTION OF A LEAP SECOND TO 
OCCUR AT THE END OF DEC 2008

2.  COORDINATED UNIVERSAL TIME (UTC) WILL SEQUENCE AS FOLLOWS:
             31 DEC 2008 23 HOURS 59 MINUTES 59 SECONDS
             31 DEC 2008 23 HOURS 59 MINUTES 60 SECONDS
             01 JAN 2009 00 HOURS 00 MINUTES 00 SECONDS

3.  FOR GPS, AS WITH PREVIOUS LEAP SECOND UPDATES, THE UTC DATA IN
THE NAVIGATION MESSAGE WILL CHANGE IN ACCORDANCE
WITH IS-GPS-200.
    BEFORE THE LEAP SECOND
    GPS-UTC IS 14 (GPS IS AHEAD OF UTC BY 14 SECONDS)

    AFTER THE LEAP SECOND
    GPS-UTC WILL BE 15 (GPS WILL BE AHEAD OF UTC BY 15 SECONDS)

4.  POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV
    MILITARY - GPS OPERATIONS CENTER AT
HTTP://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
    COMM 719-567-2493, GPS@SCHRIEVER.AF.MIL,
HTTP://GPS.AFSPC.AF.MIL/GPS
    MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-
9994.COMM 805-606-9994.
    JSPOCCOMBATOPS@VANDENBERG.AF.MIL